Basketball Scoring Problem: Solve for (a+4) Close-Range Shots with 56 Total Points

Linear Equations with Variable Expressions

A basketball player scores 3 points for each long-range shot and 2 points for each close-range shot.

He scores a total of 8 long-range shots and a+4 a+4 close-range shots.

How many shots does he score in total if he gets 56 points?

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Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

A basketball player scores 3 points for each long-range shot and 2 points for each close-range shot.

He scores a total of 8 long-range shots and a+4 a+4 close-range shots.

How many shots does he score in total if he gets 56 points?

2

Step-by-step solution

To solve this problem, we'll follow these steps:

  • Step 1: Calculate the total points from long-range shots.
  • Step 2: Formulate an equation for total points scored.
  • Step 3: Solve for unknown a a using algebra.
  • Step 4: Determine the total number of shots.

Now, let's work through each step:

Step 1: Compute points from long-range shots: The player makes 8 long-range shots, each worth 3 points. Thus, the total points from long-range shots are: 3×8=24 3 \times 8 = 24

Step 2: Set up the total points equation. Let the points from close-range shots be denoted by 2×(a+4) 2 \times (a + 4) . The total points scored is 56, so the equation becomes: 24+2×(a+4)=56 24 + 2 \times (a + 4) = 56

Step 3: Solve for a a . Expanding the equation, we get: 24+2a+8=56 24 + 2a + 8 = 56 Simplify the equation: 2a+32=56 2a + 32 = 56 Subtract 32 from both sides: 2a=24 2a = 24 Divide by 2 to solve for a a : a=12 a = 12

Step 4: Calculate the total number of shots. Plugging a=12 a = 12 back into the expression for close-range shots, we get a+4=16 a+4 = 16 . Therefore, the total shots are 8+16=24 8 + 16 = 24 .

Therefore, the solution to the problem is 24.

3

Final Answer

24

Key Points to Remember

Essential concepts to master this topic
  • Setup: Create equation using given point values and totals
  • Technique: Expand 2(a+4) = 2a + 8 before solving
  • Check: Verify 8 long + 16 close shots = 24 + 32 = 56 points ✓

Common Mistakes

Avoid these frequent errors
  • Forgetting to expand the expression (a+4)
    Don't treat (a+4) as a single unit when multiplying by 2 = incomplete equation! This skips the distribution step and leads to incorrect algebraic manipulation. Always expand 2(a+4) to 2a + 8 first.

Practice Quiz

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\( 3x=18 \)

FAQ

Everything you need to know about this question

Why do I need to find the value of 'a' instead of just solving directly?

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The problem asks for total shots, but close-range shots are given as a+4 a+4 . You must find a = 12 first, then calculate a+4=16 a+4 = 16 close-range shots to get the final answer.

How do I set up the points equation correctly?

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Points from long-range: 3 × 8 = 24
Points from close-range: 2 × (a+4)
Total equation: 24 + 2(a+4) = 56

What does it mean to expand 2(a+4)?

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Expanding means using the distributive property: multiply 2 by each term inside the parentheses.
2(a+4)=2×a+2×4=2a+8 2(a+4) = 2 \times a + 2 \times 4 = 2a + 8

How can I check if my final answer of 24 shots is correct?

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Verify the point total: 8 long-range shots × 3 points = 24 points and 16 close-range shots × 2 points = 32 points. Total: 24 + 32 = 56 points ✓

What if I get confused about which number represents what?

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  • 8: Number of long-range shots (given)
  • a+4: Number of close-range shots (unknown)
  • 56: Total points scored (given)
  • 24: Total number of shots (what we're finding)

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